In some instances it is necessary to boot the system to 32 bit mode
or 64 bit mode.
To find out if your machine can boot into 64 bit mode, enter
# isalist
If you do not see "sparcv9", you will not be able to boot this
system into 64 bit mode.
Note: On Ultra systems with a CPU speed of 200 MHz or less, the file
/platform/sun4u/boot.conf must have the following line uncommented:
ALLOW_64BIT_KERNEL_ON_UltraSPARC_1_CPU=true
If this line was commented out when the system was booted, isalist will NOT
list sparcv9 as an option, even if all packages for 64 bit support are
installed.
===================================================================
To see if you are currently in 64 or 32 bit mode, enter:
# isainfo -v
If the output shows:
64-bit sparcv9 applications
32-bit sparc applications
then you are running 64 bit mode.
If the output shows:
32-bit sparc applications
then you are booted into 32 bit mode.
===================================================================
To change modes, enter the following at the "ok>" prompt:
To set up booting 32-bit mode:
setenv boot-file kernel/unix
To set up booting 64-bit mode:
setenv boot-file kernel/sparcv9/unix
